'id' is enum type like unsigned int, so it will never be less than zero.
It's better to check VGA_SWITCHEROO_UNKNOWN_ID too.
Fixes: 4aaf448fa975 ("vga_switcheroo: set audio client id according to bound GPU id")
Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
---
v2:
- add check of VGA_SWITCHEROO_UNKNOWN_ID(Dan's suggestion).
By the way, all functions of 'get_client_id' will never return error code
or VGA_SWITCHEROO_UNKNOWN_ID，should we remove this check or keep it for
future.
drivers/gpu/vga/vga_switcheroo.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index 365e6ddbe90f..cf530094f929 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -375,7 +375,7 @@ int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
mutex_lock(&vgasr_mutex);
if (vgasr_priv.active) {
id = vgasr_priv.handler->get_client_id(vga_dev);
- if (id < 0) {
+ if ((int)id < 0 || id == VGA_SWITCHEROO_UNKNOWN_ID) {
mutex_unlock(&vgasr_mutex);
return -EINVAL;
}
--
2.30.2
